The suffix affects a word's part of speech. For example, the word 'happy' is an adjective. When you change the suffix, it changes the part of speech. If you change 'happy' into 'happiness' it becomes a noun; when you change it into 'happily' it becomes an adverb.
It's a suffix.
The word "-ing" is a suffix. You will see this suffix on the end of gerunds.
Suffix '-ly' is added to a word to make int into an 'adverb'. e.g. He ran quickly. or 'He walked slowly'.
A suffix changes a word's part of speech. For example, the word 'happy' is an adjective. But when you add a suffix, which is an ending, it can change the part of speech. Happily is an adverb. Happiness is a noun.
"-ward" isn't any part of speech. It's a suffix.
Suffixes cannot be parts of speech. Now the suffix emia is usually associated with words that are nounds take : leukemia : for example
determines its part of speech.
A word with the -able suffix is usually an adjective.
noun
A noun, usually meaning an operation of removal of whatever is described in the first part of the work. For example, an appendectomy removes a person's appendix.
"-ical" isn't any part of speech. It's a suffix (noun) added to a word to create an adjective.